When we select any of the drives, the Remove button remains grayed out. (see (1) in the screenshot)
Actually I am not sure why that Remove button is provided in the first place, because detailed settings for the selected volume are already provided below. (see (2) in screenshot).
- We can stop indexing the selected drive using the Include in database checkbox.
- We can include only some parts of it using the Include only... control.
- If the intent is to list all available drives (including removable drives that may not be connected at this moment), then this button is not needed at all!
- if I select the Automatically add new removable volumes, then there is no point in removing such a volume, because Everything will add it back when I plug it in.